In firefighting, what does the term “backdraft” refer to?

The term "backdraft" specifically refers to an explosive event that occurs when a fire has consumed most of the available oxygen in a confined space, creating conditions that can be very dangerous for firefighters. When fresh oxygen is suddenly introduced into this environment, often through the opening of a door or window, it can ignite the accumulated flammable gases that have built up inside. This results in a sudden and violent explosion of flames, which can significantly increase the risk of injury or death for anyone in the vicinity.

This understanding of backdraft emphasizes the critical importance of recognizing fire behavior and the need for cautious tactics when entering a structure that may be experiencing such conditions. By training in recognizing the signs of backdraft and implementing appropriate firefighting techniques, firefighters can improve their safety and effectiveness in these challenging situations.